30 minuten - 1 uur
My sons iPhone battery was unable to make it through the day. I took it to the Apple Store and they verified the battery was indeed at the end of its expected life. Unfortunately, this iPhone was an insurance claim, so it was a refurb, and did not have a factory battery or screen on it, so the Apple Store was unwilling to replace the battery. So I thought I'd give it a shot.
It went well, although the adhesive tape strip was under the battery when i first opened it, and there was no way I could reach it. I had the thin guitar pick like tool that comes in the tool kit and was able to get that under the battery from the top of the phone, and then switched to a plastic knife. I used a hair dryer and some patience and increasingly got the plastic knife under it until it gave.
Upon first reassembly, the innermost screen connector apparently came loose, so when the phone first powered on, the touchscreen functionality did not work. I googled on how to power off with a dead touchscreen, and fixed that. I also had to nudge the folds of the battery cable a bit with the guitar pick tool so it would fit in there nice and not stress the connector. After reattaching the screen connectors and reassembly, I am now fully functional so far! Only I managed to strip the left pentalobe screw (or what it threads into) and the screen now has a slight flicker. A non-screen part of the front already had a crack, and I was holding off on replacing it, but I now think doing so will solve the flicker, (Will search the forums first though.) Oh - I did not notice the replacement tape until after, so my battery is loose in there. I'll just hold on to that for now...